In a recent paper by Elson and Tran [J. Opt. Soc. Am. A <b>12</b>, 1765 (1995)], numerical results are given and compared with those obtained by Li [J. Opt. Soc. Am. A <b>10</b>, 2581 (1993)]. Some strong discrepancies appear in these comparisons, especially in TM polarization. Accurate and reliable data are given to clarify this disagreement.
© 1996 Optical Society of America
G. Tayeb, "Dispersion in photonic media and diffraction from gratings: a different modal expansion for the R-matrix propagation technique: comment," J. Opt. Soc. Am. A 13, 1766-1767 (1996)